Mumbai police commissioner Prakash Rathod describes in a
voiceover that he is going to retire the following day. He goes on to describe the most challenging case he has faced in his career. An unnamed man carries a travel bag, assumed to contain
explosives, in the
Chatrapati Shivaji Terminus railway station and proceeds to hide the bag in the restroom of a
police station opposite the
Mumbai Police headquarters. He then goes to the rooftop of a building under construction, where he sets up his base of operations, equipped with SIM cards, mobile phones, and other gadgets. He calls Rathod and informs him that he has placed five bombs in locations throughout Mumbai and has programmed them to explode simultaneously within four hours unless the Commissioner gives in to his demands and releases four
terrorists. Rathod alerts his team to trace the location of the caller. The caller tips off television news reporter Naina Roy, telling her it is going to be "the most important day of her life." The four
terrorists demanded by the caller are rounded up by police officers Arif and Jai. Police depute a young hacker named Anuj to track the location of the caller. The caller asks the two police officers to leave the four militants near a bench on a
Juhu Aviation Base runway, but Arif leaves only three behind and takes one of them, Ibrahim Khan, captive as he suspects that the caller would not reveal the locations of the bombs even after the militants are released. A phone placed under the bench rings, and an explosion occurs, killing the three terrorists, and stunning Jai and Arif. The anonymous caller reveals he does not belong to any terrorist organization, and his plan was not to free the terrorists but to kill them. The caller, being just a "stupid common man wanting to clean his house," sought to avenge the terrorist attacks they had helped carry out in major cities in India, specifically the
2006 Mumbai train bombings, while also criticizing the incompetence of authorities. His final demand is that the officers kill Ibrahim themselves, or he will set off all five bombs in Mumbai. Rathod indirectly orders Arif and Jai to kill Ibrahim and make it look like it was done in self-defense. After the death of Ibrahim is confirmed on the news, the caller calls Rathod for the final time to reveal that he has not planted any other bombs in the city. Rathod declares he already knew there were no more bombs; hence, his decision to kill the last terrorist was not taken in fear but in confidence. Rathod reaches the caller's location just as the caller is leaving, having destroyed all his equipment. The two meet briefly when Rathod, identifying the caller on the basis of a face sketch, offers the man a ride home. In a voiceover, Rathod says the man told him his real name, but he does not wish to reveal it since doing so would give away the man's religion. Rathod admits that he knew the caller was disturbed because of the incompetence of the governing authorities, but he never imagined a common man would go to such lengths to achieve this end. He also notes that the facts of this incident cannot be found in any written record but only in the memories of those who actually witnessed it, and further acknowledges that although the incident has ambiguous moral significance, he feels that whatever happened, happened for the best. ==Cast==